The effects of human activities on windbreak and sand fixation services in Inner Mongolia grasslands from 2000 to 2020

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外文摘要：Windbreak and sand fixation services(SR)provided by grasslands are a joint result of climate change and human activities.Series of grassland protection measurements have been successively implemented on Inner Mongolia grasslands since 2000,but their effects on SR remains unclear.Based on satellite-derived vegetation dynamics and the Revised Wind Erosion Equation(RWEQ)model,this paper developed a method for quantitatively separating the impact of human activities on SR and revealed the contribution of human activities to SR in the Inner Mongolia grasslands from 2000 to 2020.In 2020,the actual sand fixation(SRA)of Inner Mongolia grasslands was 12.50 t·ha-1,spatially characterized as lower in the eastern and western parts,which was dominated by the sparse vegetation coverage and the low po-tential wind erosion respectively,while higher in the central part,due to the grassland vul-nerability.The human-driven sand fixation(SRH)of Inner Mongolia grasslands changed from-1.28 t·ha-1 to-0.14 t·ha-1 from 2000 to 2020,indicating human activities inhibited SR,but the inhibition was gradually weakened.In semidesert and meadow steppes,the SRH changed from-3.00 t·ha-1 to 0.00 t·ha-1 and-0.16 t·ha-1 to 0.00 t·ha-1,respectively,which showed that the effect of human activities changed from inhibition to promotion.However,it should be noted that human activities still inhibited the SR in typical steppes.The results implicated that grassland ecological protection should pay much more attention to reasonable use of vul-nerable typical steppes.Future grassland use requires quantitative evaluation on the effects of human activity for precise monitoring and sustainable management.

外文关键词：

windbreak and sand fixation serviceshuman activitiesRWEQgrassland ecosystemspatiotemporal change

作者：

YAN Huimin、XIE Gege、YAN Feng、NIU Zhongen、XUE Zhichao、WANG Boyu

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作者单位：

Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China

University of Chinese Academy of Sciences,Beijing 100049,China

Foreign Environmental Cooperation Center,Ministry of Ecology and Environment of China,Beijing 100035,China

School of Resources and Environmental Engineering,Ludong University,Yantai 264025,Shandong,China

Business School,Beijing Technology and Business University,Beijing 100048,China

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出版年：

2024

DOI：

10.1007/s11442-024-2298-8

地理学报(英文版)

中国地理学会,中国科学院地理科学与资源研究所

地理学报(英文版)

CSTPCD

影响因子：1.307

ISSN：1009-637X

年,卷(期)：2024.34(12)